Indoor Channel Measurement for Wireless Communication

In the past few years, Multiple Input Multiple Output (MIMO) system received lots of attentions, since it is capable in providing higher spectrum efficiency, as well as better transmission reliability. This improvement is brought by the multiple antennas at both sides of transmission. Since there are additional parallel sub-channels in spatial domain, system can not only increase the reliability by spatial diversity technology, but also provide higher data rate utilizing spatial multiplexing (see [1],[2], etc.). Orthogonal Frequency Division Multiplexing (OFDM) can also accommodate high data rate requirement by providing frequency multiplexing gain. To fully utilize the benefits of both technologies, the combination of the above two, MIMO-OFDM, has been employed in many wireless communication systems and protocols, such as WLAN [3] and LTE systems [4].